<template>
  <div class="app-container">
    <el-form :model="queryParams" ref="queryForm" :inline="true" label-width="68px">
      <el-form-item label="类目名称" prop="name">
        <el-input
          v-model="queryParams.name"
          placeholder="请填写类目名称"
          clearable
          size="small"
          @keyup.enter.native="handleQuery" />
      </el-form-item>
      <el-form-item>
        <el-button type="primary" icon="el-icon-search" size="mini" @click="handleQuery">搜索</el-button>
        <el-button icon="el-icon-refresh" size="mini" @click="resetQuery">重置</el-button>
      </el-form-item>
    </el-form>

    <el-row :gutter="10" class="mb8">
      <el-col :span="1.5">
        <el-button
          type="primary"
          icon="el-icon-plus"
          size="mini"
          @click="handleAdd"
          v-hasPermi="['system:category:add']">新增</el-button>
      </el-col>
      <el-col :span="1.5">
        <el-button
          type="success"
          icon="el-icon-edit"
          size="mini"
          :disabled="single"
          @click="handleUpdate"
          v-hasPermi="['system:category:edit']">修改</el-button>
      </el-col>
      <el-col :span="1.5">
        <el-button
          type="danger"
          icon="el-icon-delete"
          size="mini"
          :disabled="multiple"
          @click="handleDelete"
          v-hasPermi="['system:category:remove']">删除</el-button>
      </el-col>
      <!-- <el-col :span="1.5">
        <el-button
          type="warning"
          icon="el-icon-download"
          size="mini"
          @click="handleExport"
          v-hasPermi="['system:category:export']">导出</el-button>
      </el-col> -->
    </el-row>

    <el-table v-loading="loading" :data="categoryList" @selection-change="handleSelectionChange">
      <el-table-column type="selection" width="55" align="center" />
      <el-table-column label="排序" align="center" prop="number" width="55"/>
      <el-table-column label="类目名称" align="center" prop="name" />
      <el-table-column label="图标" align="center" prop="imgUrl">
        <template slot-scope="scope">
          <el-image :src="scope.row.imgUrl" class="table-column_image" />
        </template>
      </el-table-column>
      <el-table-column label="操作" align="center" class-name="small-padding fixed-width">
        <template slot-scope="scope">
          <el-button
            size="mini"
            type="text"
            icon="el-icon-edit"
            @click="handleUpdate(scope.row)"
            v-hasPermi="['system:category:edit']">修改</el-button>
          <el-button
            size="mini"
            type="text"
            icon="el-icon-delete"
            @click="handleDelete(scope.row)"
            v-hasPermi="['system:category:remove']">删除</el-button>
        </template>
      </el-table-column>
    </el-table>
    
    <pagination
      v-show="total > 0 "
      :total="total"
      :page.sync="queryParams.pageNum"
      :limit.sync="queryParams.pageSize"
      @pagination="getList" />

    <!-- 添加或修改商品类目对话框 -->
    <el-dialog :title="title" :visible.sync="isShow" :close-on-click-modal="false" width="500px">
      <el-form ref="form" :model="form" :rules="rules" label-width="80px">
        <el-form-item label="排序" prop="number">
          <el-input v-model="form.number" placeholder="请填写排序" type="number" />
        </el-form-item>
        <el-form-item label="类目名称" prop="name">
          <el-input v-model="form.name" placeholder="请填写类目名称" />
        </el-form-item>
        <el-form-item label="图标" prop="imgUrl">
          <el-upload
            :action="upload.action"
            :limit="upload.limit"
            :accept="upload.accept"
            :file-list="fileList"
            :on-error="handleUploadError"
            :on-exceed="handleExceed"
            :on-change="handleChange"
            :http-request="httpRequest"
            :show-file-list="false"
            :auto-upload="true"
            list-type="picture-card"
            ref="upload">
            <div class="upload-image" v-if="form.imgUrl">
              <img :src="form.imgUrl" />
              <i class="el-icon-error" @click="deleteURL"></i>
            </div>
            <i class="el-icon-plus" @click="submitUpload" v-else></i>
          </el-upload>
        </el-form-item>
      </el-form>
      <div slot="footer" class="dialog-footer">
        <el-button type="primary" @click="submitForm">确 定</el-button>
        <el-button @click="cancel">取 消</el-button>
      </div>
    </el-dialog>
  </div>
</template>
<script>
import { listCategory, getCategory, delCategory, addCategory, updateCategory, exportCategory } from "@/api/applet/category"
import { uploadImg } from "@/api/applet/common"
export default {
  data() {
    return {
      // 遮罩层
      loading: true,
      // 选中数组
      ids: [],
      // 非单个禁用
      single: true,
      // 非多个禁用
      multiple: true,
      // 总条数
      total: 0,
      // 商品类目表格数据
      categoryList: [],
      // 弹出层标题
      title: "",
      // 是否显示弹出层
      isShow: false,
      // 查询参数
      queryParams: {
        pageNum: 1,
        pageSize: 10,
        name: undefined,
      },
      // 表单参数
      form: {},
      // 表单校验
      rules: {
        number: [{ required: true, message: '请填写排序', trigger: 'blur' }],
        name: [{ required: true, message: '请填写类目名称', trigger: 'blur' }],
        imgUrl: [{ required: true, message: '请上传类目图标', trigger: 'blur' }],
      },
      // 上传
      upload: {
        action: '',
        accept: '.jpg, .jpeg, .png',
        limit: 1
      },
      fileList: [],
      formData: null,
    }
  },
  watch: {
    isShow(value) {
      !value && this.deleteURL()
    },
  },
  created() {
    this.getList()
  },
  methods: {
    /** 查询商品类目列表 */
    getList() {
      this.loading = true
      listCategory(this.queryParams).then(res => {
        this.categoryList = res.rows.sort((a, b) => a.number - b.number)
        this.total = res.total
        this.loading = false
      })
    },
    // 取消按钮
    cancel() {
      this.isShow = false
      this.reset()
    },
    // 表单重置
    reset() {
      this.form = {
        id: undefined,
        name: undefined,
        imgUrl: undefined,
        number: undefined,
        createTime: undefined
      }
      this.resetForm("form")
    },
    /** 搜索按钮操作 */
    handleQuery() {
      this.queryParams.pageNum = 1
      this.getList()
    },
    /** 重置按钮操作 */
    resetQuery() {
      this.resetForm("queryForm")
      this.handleQuery()
    },
    // 多选框选中数据
    handleSelectionChange(selection) {
      this.ids = selection.map(item => item.id)
      this.single = selection.length!=1
      this.multiple = !selection.length
    },
    /** 新增按钮操作 */
    handleAdd() {
      this.reset()
      this.isShow = true
      this.title = "添加商品类目"
    },
    /** 修改按钮操作 */
    handleUpdate(row) {
      this.reset()
      const id = row.id || this.ids
      getCategory(id).then(res => {
        this.form = res.data
        this.isShow = true
        this.title = "修改商品类目"
      })
    },
    /** 提交按钮 */
    submitForm: function() {
      this.$refs["form"].validate(valid => {
        if (valid) {
          this.formData
            ? uploadImg(this.formData).then(res => {
                this.form.imgUrl = res.url
                this.handleSubmit()
              })
            : this.handleSubmit()
        }
      })
    },
    async handleSubmit() {
      try {
        let res = null, text = ''
        if (this.form.id) {
          res = await updateCategory(this.form)
          text = '修改'
        } else {
          res = await addCategory(this.form)
          text = '新增'
        }

        if (res.code === 200) {
          this.msgSuccess(`${text}成功`)
          this.isShow = false
          this.getList()
        } else {
          this.msgError(res.msg)
        }
      } catch(err) {
        console.log(err)
      }
    },
    /** 删除按钮操作 */
    handleDelete(row) {
      const ids = row.id || this.ids
      this.$confirm('是否确认删除商品类目编号为"' + ids + '"的数据项?', "警告", {
        confirmButtonText: "确定",
        cancelButtonText: "取消",
        type: "warning"
      }).then(() => {
        return delCategory(ids)
      }).then(() => {
        this.getList()
        this.msgSuccess("删除成功")
      }).catch(() => {})
    },
    /** 导出按钮操作 */
    handleExport() {
      this.$confirm('是否确认导出所有商品类目数据项?', "警告", {
        confirmButtonText: "确定",
        cancelButtonText: "取消",
        type: "warning"
      }).then(() => {
        return exportCategory(this.queryParams)
      }).then(res => {
        this.download(res.msg)
      }).catch(() => {})
    },
    /** 上传 */
    submitUpload() {
      if (this.fileList.length <= 0) {
        return false
      }
      this.$refs.upload.submit()
    },
    handleUploadError(err) {
      this.$message({
        message: '上传失败, 请重试',
        type: 'error'
      })
    },
    handleExceed() {
      this.$message({
        message: `只允许上传${this.upload.limit}个文件`,
        type: 'warning'
      })
    },
    handleChange(file, fileList) {
      this.fileList = fileList
      this.form.imgUrl = file.url
    },
    httpRequest(param) {
      this.formData = new FormData()
      this.formData.append('file', param.file)
    },
    deleteURL(e) {
      e && e.stopPropagation()
      this.form.imgUrl = undefined
      this.fileList = []
      this.formData = null
    },
  }
}
</script>
<style lang="scss" scoped>
.table-column_image {
  width: 70px;
  height: 70px;
}
.upload-image {
  width: 100%;
  height: 100%;
  position: relative;

  i {
    position: absolute;
    top: 0;
    right: 0;
  }
  img {
    width: 100%;
  }
}
</style>